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Revision as of 12:12, 11 July 2007 (edit) Sandman (Talk | contribs) m (→Example) ← Previous diff		Revision as of 15:06, 1 March 2008 (edit) (undo) Sandman (Talk | contribs) Next diff →
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	== Example ==		== Example ==
	<pre>		<pre>
-	Program angling;
	Const		Const
	screen_width = 320;		screen_width = 320;
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	screen_fps = 60;		screen_fps = 60;
	screen_frameskip = 0;		screen_frameskip = 0;
		+	End
		+
	Global		Global
	int distance;		int distance;
	int tempID;		int tempID;
		+	End
		+
		+	Process Main()
	Begin		Begin
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	It could look something like:<br>		It could look something like:<br>
-	http://wwwhome.cs.utwente.nl/~bergfi/fenix/wiki/fget_angle.PNG	+	{{Image
		+	| image = fget_angle.png
		+	| caption = fget_angle() and fget_distance()
		+	}}
		+
		+	{{Funcbox
		+	| category = Math
		+	}}

---

Revision as of 15:06, 1 March 2008

Contents 1 Definition 2 Parameters 3 Returns 4 Notes 5 Example

Definition

INT fget_angle ( <INT pointA-X> , <INT pointA-Y> , <INT pointB-X> , <INT pointB-Y> )

Returns the angle between two certain points. The returned angle will be ranging from 0 to 360000 (0-360º).

Parameters

INT pointA-X	- The X-coordinate of point A.
INT pointA-Y	- The Y-coordinate of point A.
INT pointB-X	- The X-coordinate of point B.
INT pointB-Y	- The Y-coordinate of point B.

Returns

INT : The angle between point A and point B.

Notes

The angle value returned by this function is in thousandths of degrees, as most angles within Fenix are.

Example

Const
    screen_width     = 320;
    screen_height    = 200;
    screen_depth     = 8;
    screen_fps       = 60;
    screen_frameskip = 0;
End

Global
    int distance;
    int tempID;
End

Process Main()
Begin

    // Set the screen mode
    set_mode(screen_width,screen_height,screen_depth);
    set_fps(screen_fps,screen_frameskip);

    // Change this to see what happens
    resolution = 100;

    // Create mouse graph, assign to mouse.graph
    mouse.graph = new_map(20,20,screen_depth);
    map_clear(0,mouse.graph,rgb(255,0,0));

    // Create arrow, assign to graph
    graph = new_map(30,30,screen_depth);
    drawing_map(0,graph);
    drawing_color(rgb(0,255,0));
    draw_line( 0,29,29,30/2);
    draw_line( 0, 0,30,30/2);

    // Set position
    x = screen_width /2 * resolution;
    y = screen_height/2 * resolution;

    // Display distance
    write(0,0,0,0,"Distance:");
    write_int(0,60,0,0,&distance);

    // Always point to the mouse
    Repeat
        // Get the angle and distance between this process' coordinates and those of the mouse.
        angle    = fget_angle(x,y,mouse.x*resolution,mouse.y*resolution);
        distance = fget_dist (x,y,mouse.x*resolution,mouse.y*resolution);
        frame;
    Until(key(_esc))

End

Used in example: set_mode(), new_map(), map_clear(), drawing_map(), drawing_color(), draw_line(), write(), write_int(), fget_angle(), fget_dist(), resolution, mouse, graph, x, y, angle

This example could also be done with get_angle(), but that would be more work.

It could look something like:

fget_angle() and fget_distance()

Math Functions

• Abs() • Acos() • Asin() • Atan() • Cos() • Fget_angle() • Fget_dist() • Get_distx() • Get_disty() • Pow() • Rand() • Rand_seed() • Sin() • Sqrt() • Tan() •